ES2301837T3 - FOAM IMPROVED BY CATIONIC POLYMERS. - Google Patents

Abstract

A substantially dry personal care cleansing article is provided which includes a water-insoluble substrate and associated with the substrate a personal care cleansing composition. The latter includes at least one lathering surfactant and at least about 2% of a cationic polymer. The composition has an average particle size ranging from about 75 to about 900 micron. The cationic polymer improves the rapidity and duration of foam formation when the article is wetted with water to activate the surfactant.

Description

Foam enhanced by cationic polymers.

The invention relates to an article for the personal hygiene with wipe format that has properties Improved foaming.

Traditionally, the products of personal conditioning and cleaning have been marketed in a variety of forms such as pills, liquids and gels. These formats have tried to meet several criteria of consumer acceptability Among them are effectiveness of cleanliness, sensation produced on the skin, softness and volume of the foam. Ideal products should gently clean the skin or hair, do not cause irritation or only little irritation and do not leave Very dry skin or hair after frequent use.

Procter & Gamble has published a series of granted patents and pending patent applications that describe disposable personal hygiene products that They consider many of the mentioned functionality reserves. These products are substantially dry items that have been deposited, on a woven or non-woven fabric, a composition surfactant cleaner, structuring agent, conditioner the skin and other behavioral ingredients. Technology is described in the following patents.

U.S. Patent . 5,951,991 (Wagner and others) consider the endowment of the substrate with a conditioning emulsion impregnated separately from the foaming surfactant on the fabric substrate. U.S. Patent . 5,980,931 (Fowler and others) emphasizes impregnation with soluble conditioning agents in oil. WO 99/55303 (Albacarys et al.) Describes active substances for skin care formulated with the cleaning composition

U.S. Patent . 6,063,390 (issued to Farrell and others) consider another approach to cleaning. Be describe in it cosmetic scrubbing articles based on a bag formed by at least one water permeable wall and that It contains an effervescent cleaning composition in the form of a dry anhydrous powder Effervescence and foaming are achieved with a powder combination of alkaline material, acidic material and a surfactant Several beneficial agents can be included for skin in order to improve sensory properties. They are illustrative deposit adjuvants such as cationic gums of guar, including guar hydroxypropyltrimonium chloride, in amounts up to about 1% by weight.

The U.S. document 2002/0006886 (Beerse and others) describes a dry disposable article comprising a substrate insoluble in water and a therapeutically beneficial component that it comprises a cationic polymer and an anionic surfactant, in the that the composition forms a coacevate when said article It is added to the water.

U.S. Patent . 5,417,965 (Janchitraponvej) describes a conditioning shampoo comprising surfactants anionic and cationic polymers.

Patent FR 2,276,030 describes an article that Contains an exfoliating agent to remove dead cells from the skin.

A general problem with dry items of scrub cleaning is the tendency for foam not to last too. Systems have been sought that will extend the phenomenon of foam.

In a first aspect, an article is provided for substantially dry personal hygiene that includes:

(i)

a water insoluble substrate;

(ii)

a personal care composition adjacent to the substrate, which It includes:

(to)

from 0.5% to 60% by weight of the composition of at least one surfactant foam former;

(b)

from 2% to 15% by weight of the composition of a cationic polymer, Y

(C)

a vehicle for the foam forming surfactant, having the composition an average particle size that varies from 75 to 900 micrometers

It has now been discovered that polymers cationic can extend the duration of foam in articles Soaps dried to scrub. The improvement is achieved with at least 2% by weight of the care composition staff of a cationic polymer, these levels being significantly higher than those normally used in such systems. Typical levels in commercial products are they maintain considerably below 1%, usually of approximately 0.3% -0.5%, and act as deposit aids or conditioners rather than as agents intensify the foaming In addition, it has been found that the composition must have an average particle size in the range of about 75 to about 900 micrometers, preferably about 100 to about 500 micrometers, optimally from approximately 180 to 400 micrometers.

Thus, an important element of the component for personal care of the composition of articles for scrubbing according to the present invention is the cationic polymer. The polymer amounts may vary from about 2% to about 15%, preferably about 3% at about 10%, optimally about 4% at approximately 8% by weight of the care composition personal.

The cationic polymers suitable for the purposes of this invention can be selected from derived polymers of cellulose and synthetic polymers.

Cellulose derived polymers . By "cellulose-derived polymer" is meant any polymer that contains a cellulose skeleton, that is, a polysaccharide. In these cellulose-derived polymers, the hydroxy groups of the cellulose polymer have been hydroxyalkylated (preferably hydroxyethylated or hydroxypropylated) to form a hydroxyalkylated cellulose, which is then modified with a cationic group of quaternary ammonium or protonated ammonium. Preferred cationic modifying groups are those which have at least one C 10-20 alkyl chain and two shorter alkyl chains (that is, C 1 or C 2) on the nitrogen. The substituent in the cellulose polymer can thus be represented as - (X) NR'R '' in which X is hydroxyalkyl (preferably -OCH2CH2- or -OCH2CHOHCH2-) ), R and R 'are methyl or ethyl and R''is C 10-20 alkyl [preferably lauryl, stearyl or cocoyl (this is a mixture of alkyl groups derived from coconut oil)]. In other alternative structures it has been found that when R, R 'and R''are all methyl (that is, the trimony group), useful cellulosic polymers are also obtained. In other alternatives, the cationic cellulose substituent contains a hydroxyethyl group and a hydroxypropyl group, so that the remainder can be represented as - (OCH2CH2O) -CH2CHOHCH2 NRR 'R', in which R, R 'and R''are methyl or ethyl and R''is C 10-20 alkyl [preferably lauryl, stearyl or cocoyl (ie, a mixture of alkyl groups derived from coconut oil)] or, alternatively, in which R, R 'and R''are all methyl (that is, the trimony group).

Among the modified cationic celluloses commercially available are included laurdimonium hydroxyethyl cellulose (in whose formula above X is -OCH 2 CH 2 -, R and R 'are methyl and R' 'is lauryl), and steardimonium hydroxyethyl cellulose (in whose formula above X is -OCH 2 CH 2 -, R and R 'are methyl and R' 'is stearyl). These Materials are known under the trade names CRODACEL QL and CRODACEL AS, all of them commercially available from Croda Corp. Another very useful catholic cellulose is laurydimonium hydroxypropyloxyethylcellulose (in which the group modifier on cellulose is - (OCH 2 CH 2 O) -CH 2 CHOHCH 2 NRR'R '', in which R, R 'are methyl and R' 'is lauryl), available commercially as CRODACEL QK SPECIAL, of Croda Corp.

Other useful cationic celluloses are affordable from Amerchol Corp. (Edison, N.J., USA) as POLYMER of the series JR, LR and LK, which are hydroxyethyl cellulose salts that have reacted with triethylammonium substituted epoxide, referred to in the industry (CTFA) Polyquaternium 10; and the ammonium polymer salts hydroxyethyl cellulose quaternary that has reacted with epoxide substituted with lauryl dimethyl ammonium, denominated in the industry (CTFA) Polyqueternium 24, available from Amerchol Corp. (Edison, N.J., USA) under the trade name POLYMER LM-200

Among other suitable cationic polymers that can be used in this context cationic derivatives are included  of guar gum such as polylactomannan rubber derivative described in U.S. Pat. . 4,298,494, which are available commercially under the trademark JAGUAR; the derivative guar gum hydroxypropyltrimethylammonium, available commercially under the trademark JAGUAR C-13S and JAGUAR C-17 (CTFA designation of chloride guar hydroxypropyltrimony); and the cationic derivative hydroxypropyl guar known as JAGUAR C-16. Other materials include cellulose ethers that they contain quaternary nitrogen (for example, those described in the U.S. Patent ,. . 3,962,418) and copolymers of etherified cellulose and starch (for example, those described in U.S. Patent No. 3,958,581).

They are related to these polymers cellulosics those derived from other sugars (or their acids, alcohols, amines, etc. related), for example, galactose, mannose, arabinose, xylose, fructose, glucosamine, galactosamine, acid glucuronic acid, galacturonic acid, 5 or 6 membered polyols or their mixtures

As for synthetic polymers: suitable cationic polymers in this category include copolymers of vinyl monomers having cationic amine or quaternary amino functionalides with water soluble spacer monomers such as acrylamide, methacrylamide, alkyl- and dialkylacrylamides, alkyl- and dialkyl acrylamides, alkyl acrylate, alkyl methacrylate, vinylcaprolactone and vinyl pyrrolidone. Alkyl substituted and dialkyl substituted monomers preferably have C 1-7 alkyl groups, more preferably C 1-3 alkyl groups. Other suitable spacer monomers include vinyl esters, vinyl alcohol (made by hydrolysis of polyvinyl acetate), maleic anhydride, propylene glycol and ethylene glycol.

Cationic amines can be amines primary, secondary or tertiary, depending on the species particular. In general, secondary amines and tertiary, especially tertiary amines,

The substituted amined vinyl monomers are they can polymerize in the form of amine and then, optionally, convert to ammonium by a quaternization reaction. Similarly, amines can be quaternized after polymer formation For example, amine functionalities tertiary can be quaternized by reaction with a salt of the formula R'X in which R 'is a short alkyl chain, preferably a C 7-10 alkyl, more preferably a C 1-3 alkyl, and X is a anion that forms a water soluble salt with ammonium quaternized

Between the amino and ammonium cationic monomers Quaternary are included, for example, vinyl compounds substituted with dialkylaminoalkyl acrylate, methacrylate dialkylaminoalkyl acrylate monoalkyl aminoalkyl, methacrylate monoalkylaminoalkyl, trialkylmethacryloxyalkyl ammonium salt, trialkylacryloxyalkyl ammonium salt, ammonium salts diallyl quaternary and quaternary ammonium vinyl monomers that have cationic cyclic rings that contain nitrogen, such as pyridinyl, imidazolium and quaternized pyrrolidone, by example, alkylvinylimidazolium, alkylvinylpyridinium salts, alkyl vinyl pyrrolidone. Preferably, the alkyl portions of these monomers are lower alkyls such as alkyls C 1-3, preferably C 1 alkyls and C_ {2}.

Among the vinyl monomers substituted with Acid suitable for use in this context are included acrylate of dialkylaminoalkyl, dialkylaminoalkyl methacrylate, dialkylaminoalkylacrylamide and dialkylaminoalkylmethacrylamide, in which, preferably, the alkyl groups are hydrocarbyls C 1-7, more preferably alkyls C_ {12-13}.

Its cationic polymers may comprise mixtures of monomer units derived from a substituted monomer with amine and / or quaternary ammonium and / or spacer monomers compatible.

Among the synthetic cationic polymers suitable copolymers of 1-vinyl-2-pyrrolidone and you leave 1-vinyl-3-methylimidazolium (for example, chloride salt) (called Polyquaternium-16), commercially available at BASF Wyandotte Corp. (Parsippany, N.J., USA) under the name LUVIQUAT commercial (for example, LUVIQUAT FC 370); copolymers of 1-vinyl-2-pyrrolidone and dimethylaminoethyl methacrylate (called Polyquaternium-11), commercially available at ISP Corporation (Wayne, N.J., USA) under the trade name GAFQUAT (for example, GAFQUAT 755 and 755N); cationic diallyl polymers containing quaternary ammonium, including, for example, homopolymer of dimethyldiallylammonium chloride and copolymers of acrylamide and dimethyldiallylammonium chloride (called, respectively, Polyquaternium 6 and Polyquaternium 7), the salts of mineral acids of aminoalkyl esters of homopolymers and copolymers of unsaturated carboxylic acids having 3 to 5 carbon atoms; the cationic graft polymer containing N-vinyl pyrrolidone, dimethylaminoethyl methacrylate  and polyethylene glycol; high molecular weight cationic polymers designated Quaternium-40 (a cationic homopolymer of highly charged dimethyldiallylammonium chloride) and Quaternium-41 (a highly cationic polymer charged prepared with dimethyldiallylammonium chloride and acrylamide), which are commercially available under trademarks MERQUAT 100 and MERQUAT 550 of Merk & Com., Inc .; and mixtures of they.

Other element of the compositions according with the present invention it is a surfactant that foams. By "foaming surfactant" means a surfactant that when combined with water and mechanically stirred it generates a foam or soap. Preferably, these foaming surfactants they must be soft, which means they must provide sufficient cleaning or detergent benefits but not leaving excessively dry skin or hair.

Typically, the articles of the present invention include at least one foam forming surfactant in an amount of about 0.5% to about 60%, preferably from about 0.75% to about 40% and, more preferably, from about 1% to about 20%, in relation to the weight of the composition.

In this context a wide variety are useful of foam forming surfactants and among them are the selected from the group consisting of surfactants anionic, nonionic, cationic, amphoteric and mixtures thereof.

Among the anionic surfactants forming foam are the following non-limiting examples that include the classes of:

(one)

alkylbenzenesulfonates in which the alkyl group contains from 9 to 15 carbon atoms, preferably from 11 to 14 carbon atoms in the linear chain configuration or branched. Especially preferred is an alkylbenzenesulfonate. linear that contains approximately 12 carbon atoms in the alkyl chain.

(2)

alkylsulfates obtained by Sulfation of an alcohol that has 8 to 22 carbon atoms. The alkyl sulfates have the formula ROSO 3 -M +, where R is the alkyl group C 8-22 and M is a monovalent cation and / or divalent

(3)

parafinsulfonates that are 8 to 22 carbon atoms, preferably 12 to 16 carbon atoms In the rest I rent. These surfactants are commercially affordable as Hostapur SAS, from Hoechst Celanese.

(4)

olefinsulfonates that are 8 to 22 carbon atoms, preferably from 12 to 16 carbon atoms. Is C 14-16 olefin sulfonate is most preferred, Affordable as Bioterge AS 40®.

(5)

alkyl ether sulfates derived from a alcohol having 8 to 22 carbon atoms, preferably 12 at 16 carbon atoms, ethoxylated with less than 30, preferably less than 12 moles of ethylene oxide. The lauryl is very preferred sodium ether sulfate, formed with an average ethoxylation of 2 moles, commercially available as Standopol ES-2®.

(6)

alkyl glyceryl ether sulfonates that they have 8 to 22 carbon atoms, preferably 12 to 16 carbon atoms, in the rest alkyl.

(7)

fatty acid esters sulfonates of the formula R 1 CH (SO 3 - M +) CO 2 R 2, in which R 1 is linear or branched alkyl with approximately C 8-18, preferably C 12-16 and R 2 is linear alkyl or branched out of about C 1-6, preferably mainly C 1, and M + represents a monovalent or divalent cation.

(8)

secondary alcohol sulfates that you have from 16 to 18 carbon atoms, preferably from 8 to 16 atoms of carbon.

(9)

fatty acyl isethionates having 10 to 22 carbon atoms, with cocoylisethionate being preferred sodium

(10)

dialkylsulfosuccinates in which each of the alkyl groups varies from 3 to 20 atoms of carbon.

(eleven)

corresponding alkanoylsarcosinates to the formula RCON (CH 3) CH 2 CH 2 CO 2 M, wherein R is alkyl or alkenyl of about 10 to approximately 20 carbon atoms and M is a cation soluble in water such as ammonium, sodium, potassium and trialkanolammonium. Is very preferred sodium lauryl sarcosinate.

(12)

alkyl lactylates in which alkyl groups vary from 8 to 12 carbon atoms, the most preferred sodium lauroyl lactylate, sold as Pationic 138C® by Patterson Chemical Company.

(13)

taurates that have 8 to 16 atoms carbon, with methyl cocoyl restaurant being preferred.

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Among the foam-forming surfactants not Ionic, suitable for the present invention, are included C 10-20 hydrophobic alcohol or fatty acid condensed with 2 to 100 moles of ethylene oxide or oxide of propylene per mole of hydrophobe; C 2-10 alkyl phenols condensed with 2 to 20 moles of alkylene oxide; esters of ethylene glycol monoacid and fatty diacid such as distearate ethylene glycol; fatty acid monoglycerides; mono- and diacids C 8-20 sorbitan fatty acids; Y Affordable polyoxyethylene sorbitan such as Polysorbate 80 and Tween 80®, as well as combinations of any of the surfactants previous.

Among other useful nonionic surfactants alkyl polyglycosides, fatty amides of saccharides (for example, methylgluconamides) as well as tertiary amine oxides of long chain. Examples of the last category are: oxide dimethyldodecylamine oxide oleildi (2-hydroxyethyl) amine, oxide dimethyl octylamine, dimethyldecylamine oxide, dimethyltetradecylamine oxide, di (2-hydroxyethyl) tetradecylamine, oxide of 3-didodecyloxy-2-hydroxypropyl (3-hydroxypropyl) amine and dimethylhexadecylamine oxide.

The group of amphoteric surfactants that form foam useful for the present invention includes aliphatic amines secondary and tertiary, preferably those in which the nitrogen is in a cationic state, in which the radicals aliphatics can be straight or branched chain and in which one of the radicals contains a water-soluble ionizable group such as carboxy, sulphonate, sulfate, phosphate or phosphonate. They are Illustrative substances, cocamidopropyl betaine, cocanfoacetate, cocanfodiacetate, cocanfopropionato, cocanfodipropionato, cocamidopropyl hydroxysultaine, cetyl dimethyl betaine, phosphate cocamidopropyl PG-dimonium chloride, cocodimethylcarboxymethyl betaine, cetyl dimethyl betaine and its combinations

A necessary element of the present invention It is a water insoluble substrate. By "insoluble in water" is understand that the substrate does not dissolve or disintegrate easily after immersing it in water. As a substrate, a Wide variety of materials. The following may be desirable non-limiting characteristics: (i) a wet strength enough for use; (ii) sufficient abrasion capacity; (iii) sufficient volume and porosity; (iv) sufficient thickness and (v) appropriate size.

Among the non-limiting examples of substrates suitable insoluble that meet the above criteria are including nonwoven substrates, woven substrates, substrates hydrotreated, airborne substrates and the like. The preferred embodiments employ nonwoven substrates because they are Economical and easily available in a variety of materials. Nonwoven means that the layer is composed of fibers that are not woven like a cloth but form a sheet, in particular, a tissue. The fibers may be random (that is, randomly aligned) or they can be carded (that is, commanded to orient mainly in one direction). In addition, the substrate does not fabric can be composed of a combination of fiber layers random and carded.

Nonwoven substrates may comprise a variety of materials, both natural and synthetic. By "natural" means that materials are derived from plants, Animals, insects or by-products. By "synthetic" is meant that the materials are mainly obtained from various materials made by man or a material that is usually a network fibrous comprising any of the common or natural fibers of textile length or mixtures of them.

They are non-limiting examples of materials natural fibers useful in the present invention, silk fibers, fibers of keratin and cellulosic fibers. Among the non-limiting examples of keratin fibers are those selected from the group consisting of wool fibers, camel hair fibers and Similar. Among the non-limiting examples of cellulosic fibers Those selected from the group consisting of wood pulp fibers, cotton fibers, hemp fibers, Jute fibers, flax fibers, and mixtures thereof.

Among the non-limiting examples of materials Synthetics useful in the present invention include the selected from the group consisting of acetate fibers, Acrylic fibers, cellulose ester fibers, modacrylic fibers, polyamide fibers, polyester fibers, polyolefin fibers, polyvinyl alcohol fibers, rayon fibers, and mixtures of them. Among the examples of some of these materials Synthetic are included acrylic materials such as Acrilan®, Creslan® and Orlon® fiber, based on acrylonitrile; cellulose ester fibers such as cellulose acetate, Arnel®, and Acele®; polyamides such as nailons (for example, nylon 6, nylon 66 and nylon 610); polyesters such as Fortrel®, Kodel® and Dacron®; polyolefins such as polypropylene, polyethylene; polyvinyl acetate fibers and their mixtures

Nonwoven substrates made of materials natural consist of nets or leaves very commonly formed on a fine wire sieve from a liquid suspension of the fibers

Substrates made of natural materials useful in the present invention can be obtained from a wide variety of commercial sources. Among the non-limiting examples of suitable, commercially available paper layers, are Airtex®, a stamped cellulosic layer deposited by air, available from James River Corporation, Green Bay, WI; and Walkisoft®, a printed cellulosic material deposited by air, available from Walkisoft USA, Mount Holly, NC.

Nonwoven substrates can also be obtained made of synthetic material, useful in the present invention, of A wide variety of commercial sources. Between the examples no Limitations of materials in suitable nonwoven layers in this invention are included HFE-40-047, a hydrotreated material with openings containing approximately 50% rayon and 50% of polyester, available from Vertec, Inc., Walpole, MA; HEF 140-102, a hydrotreated material with openings that Contains approximately 50% rayon and 50% polyester, available  de Veratec, Inc., Walpole, MA; Novenet® 149-191, a material configured as grid, thermounit, containing approximately 69% rayon, approximately 25% polypropylene and approximately 6% cotton, available from Veratec, Inc., Walpole, MA; HEF Nubtex® 149-801, a material hydrotreated with openings and bumps, which contains approximately 100% polyester, available from Veratec, Inc., Walpole, MA; Keybak® 951V, a material with openings formed in dry containing approximately 75% rayon and approximately 25%  of acrylic fibers, available from Chicopee Corporation, New Brunswick, NJ; Keybak® 1368, a material with openings, which It contains approximately 75% rayon and approximately 5% of polyester, available from Chicopee Corporation, New Brunsvick, NJ; Duralace® 1236, a hydrotreated material, with openings, which Contains approximately 100% rayon, available from Chicopee Corporation, New Brunsvick, NJ; Duralace® 5904, a material hydrotreated, with openings, containing approximately 100% of polyester, available from Chicopee Corporation, New Brunsvick, NJ; Sontara® 8868, a hydrotreated material, with openings, containing approximately 50% cellulose and approximately 50% polyester, available from Dupont Chemical Corp.

The water insoluble substrates of the present invention may comprise two or more layers, each with a different texture and abrasion capacity. Textures different may result from the use of different combinations of materials or using a substrate that has a more abrasive face for exfoliation and a softer, absorbent face to clean softly. In addition, separate substrate layers can be manufactured  that have different colors, which helps the user to distinguish more surfaces.

The amount of care composition personnel in relation to the substrate may vary in weight of about 20: 1 to 1:20, preferably from 10: 1 to about 1:10 and, optimally, about 2: 1 a approximately 1: 2 by weight.

Although the present invention can operate with articles for scrubbing of a single substrate, the preferred use is with a bag that includes an effervescent cleansing composition for personal care The latter is in the form of a powder substantially anhydrous which includes an alkaline material and a acidic material that together, when moistened with water, release carbon dioxide. At least one powder is formulated surfactant that foams and the cationic polymer that intensifies the speed and duration of foaming.

In this preferred embodiment, the sachet is in the form of a sack that is constructed with at least one water permeable wall. A preferred embodiment of the sachet includes a thread-fitting substrate and a second wall formed by a substrate of molten-blown composite material, the latter being attached to a sheet of a large specific volume. The effervescent powder personal care composition is dosed into the sachet and the walls are ultrasonically sealed to ensure there is no loss of the powder composition. When the sachet is moistened with water, an abundant foam is formed, much like a dressing table
lather

When the composition for personal care It is an effervescent system, an acidic material will be present. TO for this purpose any acids and, preferably, the present in the form of dry solid. They are especially appropriate organic monocarboxylic and polycarboxylic acids C 2-20 and, especially, α- and acids β-hydroxycarboxylic; organophosphorus acids C 2-20 such as phytic acid; acids C2-20 organoazufre such as toluene acid sufónico_ {;} and peroxides such as hydrogen peroxide. Between Typical hydroxycarboxylic acids are adipic acids, glutaric, succinic, tartaric, malic, maleic, lactic, salicylic and citric, as well as lactones that form such an acid like gluconolactone and glucarolactone. Acid is very preferred citric.

They may also be suitable as acidic material. encapsulated acids. The appropriate encapsulation material can include synthetic or natural polymers such as polyacrylates (for example, poly (acrylic acid) to encapsulate), gums cellulosic, polyurethane and polyoxyalkylene polymers. It is understood the term "acid" as any substance that, when dissolved in deionized water at a concentration of 1%, it will have a pH of less than 7, preferably less than 6.5, optimally of less than 5. Preferably, these acids are solid at 25 ° C, this that is, they will have a melting point of not less than 25 ° C. The Acid concentrations should vary from approximately 0.5% to about 80%, preferably about 10% at about 65%, optimally about 20% at approximately 45% by weight of the total concentration.

For an effervescent cleansing composition for personal care inside the bag must be present an alkaline material The alkaline material is a substance that can generate a gas such as carbon dioxide, nitrogen or oxygen, that is, effervescent, when it comes into contact with water and the acidic material. They are suitable alkaline materials, salts anhydrous carbonate and bicarbonate, alkaline peroxides (for example, sodium perborate and sodium percarbonate) and azides (for example, sodium azide). Preferably, the alkaline material may vary. from about 1% to about 80%, preferably from about 5% to about 49%, more preferably of about 15% to about 40%, optimally of about 20% to about 35% by weight of the composition total.

By the term "substantially anhydrous" or "substantially dry" means that it is not present more than about 25%, preferably not more than about 10%, more preferably no more than about 5% and, optimally, no more than 1% water by weight of the composition or article, respectively. For the purposes of the definition of anhydrous, I do not know consider hydration water to be water. However, it prefer to minimize, preferably eliminate, any water from hydration.

It is advantageous that the combined amount of Acid and alkaline materials be at least about 1.5%,  preferably from about 40% to about 95%, optimally from about 60% to about 80% by weight of The total composition.

To improve the properties after first skin sensation can include a variety of beneficial agents for the skin. It is advantageous that these substances are available as substantially anhydrous dry powders. Alternatively, these substances can be deposited liquids. on or in a powder substrate (for example, calcium silicate or zeolite) to get a dry powder that slides.

Within the scope of beneficial agents for The skin there are several categories of materials. Among them are including emollients, anti-aging agents, agents antibacterials and fungicides, skin lightening agents, sunscreens and combinations of them. The amounts of Agents that benefit the skin can vary from approximately 0.001% to about 40%, preferably about 0.1% to about 20%, more preferably about 0.5% to approximately 10%, optimally between approximately 1% and about 5% by weight of the total composition.

Emollients may be in the form of esters natural or synthetic, silicone oils, hydrocarbons, starches, fatty acids and mixtures thereof. Typically, the Emollient concentration may vary from about 0.1% to approximately 35% by weight of the total composition.

Silicone oils can be divided into volatile and nonvolatile varieties. The term "volatile" such as used herein refers to materials that have a room temperature a measurable vapor pressure. Preferably, volatile silicone oils are selected. between cyclic or linear polydimethylsiloxanes containing from 3 to 9, preferably 4 to 5 silicon atoms.

Among the non-volatile silicone oils useful as an emollient material are polyalkylsiloxanes, polyalkylarylsiloxanes and copolymers of polyether siloxane. Among the essentially volatile polyalkylsiloxanes for use in this context are, for example, polydimethylsiloxanes with a viscosity of about 5 to about 100.00 centistokes at 25 ° C. Among the preferred non-volatile emollients useful in the present compositions are polydimethylsiloxanes having viscosities of about 10 to about 400 centistokes
at 25 ° C.

Among the suitable ester emollients are:

(one)

Alkenyl or alkyl esters of fatty acids that have 10 to 22 carbon atoms. Between the examples of them are isoaraquidyl neopentanoate, isononyl isononanoate, oleyl myristate, oleyl stearate and oil oleate.

(2)

Ether esters such as esters of fatty acids of ethoxylated fatty alcohols.

(3)

Fatty acid esters polyhydroxyl. They are satisfactory esters of alcohols mono-y ethylene glycol ester polyhydroxy di-fatty acid, diethylene glycol esters of mono- and fatty diacid, esters of polyethylene glycol (200-8000) of mono- and di-fatty acid, 2000 polypropylene glycol monooleate, monostearate of propylene glycol 2000, ethoxylated propylene glycol monostearate, mono- and di-fatty acid glyceryl esters, esters of polyglycerol polygreases, ethoxylated glyceryl monostearate, 1,3-butylene glycol monostearate, distearate 1,3-butylene glycol, polyoxyoethylene polyol ester of fatty acid, sorbitan esters of fatty acid and esters of fatty acid polyoxyethylene sorbitan.

(4)

Wax esters such as wax bee, spermaceti, myristyl myristate, stearyl stearate and arachidyl behenate.

(5)

Sterols esters, of which they are Examples are fatty acid cholesterol esters.

(6)

Triglycerides such as oil sunflower seed, sunflower seed oil, seeds of polycotton, borage seed oil and oil safflower

Among suitable hydrocarbons such as Emollients include petrolatum, mineral oil, isoparaffins and hydrocarbon waxes such as polyethylene.

Starches are also suitable emollients. Tapioca and arabinogalactan are typical of this class.

Fatty acids may also be suitable. as emollients Normally, fatty acids have 10 to 30 carbon atoms The acids are illustrative of this category pelargonic, lauric, myristic, palmitic, stearic, isostearic, hydroxystearic, oleic, linoleic, ricinoleic, archdical, behenic and erucic.

They are also useful as beneficial agents for the skin the active anti-aging substances. Is it so included in this category vitamins, retinoids and their combinations The quantities of these materials may vary from about 0.001% to about 20% by weight of the total composition Among the right vitamins are included ascorbic acid, vitamin B 3, vitamin B 6, vitamin B 12, tocopherol as well as its salts and esters C_ {1-20}. Among the appropriate retinoids are including retinoic acid as well as its esters C 1-22 and salts, retinol and fatty esters C 1-2 of retinol, including linoleate retinol

Other class of anti-aging substances active are α- and acids β-hydroxycarboxylic acids and their salts. They are representative of this group glycolic acid, lactic acid, acid malic, hydroxyoctanoic acid, salicylic acid and mixtures thereof as well as its salts. Suitable salts are metal salts C 1-10 alkaline, ammonium and alkanol ammonium.

As beneficial agents for the skin can be also include antibacterial and fungicidal agents. They are representative of these categories triclosan, trichlorocarbon, hexetidene, chlorohexidene, gluconates, zinc salts (for example, zinc citrate and zinc phenolsulfonate), and combinations thereof.

As beneficial agents for the skin can be Also include skin illuminators. They are typical of this category niacinamide, kojic acid, arbutin, vanillin, acid ferulic acid and its esters, resorcinol, hydroquinone, extract placenta and combinations of them.

As beneficial agents for the skin can be Also include sunscreens. They are particularly preferred. Among these materials, p-methoxycinnamate ethylhexyl, available as Parsol® MCX, avoidable benzene as Parsol® 1789 and benzophenone-3, also known as oxybenzone. Inorganic active substances can be used as sunscreens, such as microfine titanium dioxide, polyethylene and several other polymers. The number of agents of sunscreen can vary, generally, from 0.1% to 30%, preferably from 2% to 20%, optimally from 4% to 10% by weight.

They can also be incorporated into compositions of the present invention functional agents adjuvants Among them are included electrolytes, thickeners and mixtures of them. The amount of these substances may vary from about 0.1% to about 20%, preferably of about 0.3% to about 10%, optimally between about 0.5% and about 5% by weight of the composition total.

Electrolytes can be selected from alkaline, alkaline earth and ammonium salts of phosphates, silicates, halides, sulfates and mixtures thereof. They are typical phosphates, potassium polymethaphosphate, sodium tripolyphosphate, tetrapyrophosphate sodium, sodium or potassium pyrophosphate and sodium hexametaphosphate. Is highly preferred potassium polymetaphosphate, available as Lipothix 100B®, which is a 70:30 mixture of potassium polymetaphosphate and sodium bicarbonate, available from Lipo Chemicals, Inc., Paterson, New Jersey Preferred sulfates are magnesium sulfates.

Among the thickeners that can improve the Skin sensation after application are included inorganic or organic substances. A thickener especially preferred is sodium magnesium silicate, available as Optigel SH®. Organic thickeners include the alginic acid as well as sodium and calcium alginates, sodium carboxymethylcellulose, hydroxypropyl methylcellulose, hydroxypropylcellulose, hydroxyethyl cellulose and combinations thereof. It is very preferred the alginic acid, commercially available as Kelacid® from Sud-Chemie Rheologicals, Louisville, Kentucky. He alginic acid is very effective in eliminating the viscous sensation associated with alkaline material deposits that have not been removed completely skin when rinsing. The amount of the thickener it can be from about 0.1% to about 20%.

The polysaccharides useful in this invention are dry anhydrous solid substances such as sorbitol, sugars (such as tetrahalosa), starches, modified starches (by example, aluminum-octenyl succinate), and its mixtures Sorbitol is very preferred.

It is advantageous to include with the composition effervescent cleaner an emotional agent such as an agent fragrant and / or a botanical extract. Frequently the agents Fragrant and botanical extracts are liquid. For this reason it may be necessary to distribute evenly and let them absorb the liquid components in the solid powder. A procedure for To achieve this better is to project these liquids on solids. The amount of fragrant and / or botanical substances combined may be at a level of about 0.1% to about 3%, preferably from 0.5% to 2%, optimally from 0.8% to 1.5% by weight of The total composition.

In the compositions of the present invention, They can also include dyes. These substances may be in an amount of about 0.5% to about 5%, preferably between 0.1% and 3% by weight.

Examples

Except in the operational examples and comparatives, or when explicitly stated otherwise, all the numbers in this description that indicate quantities of material it must be understood that they are modified by the word "approximately".

The term "comprising" means that It is not limited to any elements that are subsequently indicate, but covers unspecified elements of greater or lesser functional importance In other words, the stages, the elements or the options mentioned are not necessarily exhaustive

The following examples will illustrate more completely embodiments of this invention. All parts, percentages and proportions indicated herein descriptive and in the appended claims are by weight unless otherwise indicated.

Example 1

According to the following procedure, with the formulation given in Table 1, an article was prepared for the personal care of the effervescent type. Phase A was dry mixed in a high speed shear mixer. Phase C is then formed by mixing mineral oil, vitamin A palmitate, Vitamin E acetate, sunflower seed oil, tea extract green and fragrant agent, then projecting the combination with Stirring on calcium silicate. Then the combined phases A and C per mixture. Then phase B was incorporated with the others two phases and mixing continued for 20 minutes. Dry mix resulting was then supplied to a Chilsonator® that processed the resulting dry powder mixture between high compression rollers, resulting in a compacted tape.

A Fitz mill was used to grind the belt in small particles These particles were then screened, recycling very fine and very large particles at Chilsonator®. The particles with an average size of about 75 to about 900 micrometers and it They dosed 2.9 g in sachets. The little bags were formed from of a layer of thread lace substrate and a second wall of SMS to which a large volume sheet was sealed. All sides of the bag was welded by ultrasonic heating to ensure there was no escape from dust.

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TABLE I

one

Example 2

A time trial of the foam (LDT) with the formulation given in Table I, except that Jaguar C-13S® levels were varied from 0 to 7%. He Test procedure was as follows.

A pipe was placed adjacent to a sink plastic (35 cm x 25 cm). A bath mat was placed in the tube with a hole of a width of approximately 1 cm, facing face up smooth (no protrusions).

A cheesecloth (30 cm x 25 cm) was folded to have a double layer. This cloth was put on a glass of 400 ml precipitates. The beaker and the Cloth on a scale. The cheesecloth was removed from the beaker and was fixed to another 400 ml beaker with a band of rubber.

The effervescent cleaning item for the personal hygiene of Example 1 was placed 15 cm from the head of the sink faucet. Water was allowed to wet for 5 seconds 35-38 ° C at a flow rate of 9000 ml / min. Then he got wet the other side of the article for another 5 seconds. Then he put on the item in the plastic container on top of the bath mat and left for 5 seconds.

The article was then gently vibrated with the head of a mixer in an up-down motion for 15 seconds. Next, the article was rubbed, oriented at an angle of 45 °, manually in a circular motion on the bath mat for 30 seconds. The face of the item being rubbed was changed alternately every 5 seconds. The excess foam was removed from the fingers and hands directly to the stool.
catch.

He lifted the bath mat letting it I could remove the excess foam from each face with a spatula from the article. All the foam passed smoothly to the cheesecloth. Then the foam was dragged to the bottom of the plastic tube and the Tube foam was poured over cheesecloth.

The cheesecloth was removed from the beaker and spread over the other beaker that had been tared previously. The amount of foam in the cheesecloth.

The article briefly got wet again in a of the faces and left on the bath mat for 5 seconds. The previous process was repeated starting with the vibration Smooth item with the head of a mixer. The continued cycle again wet / foaming until the non-woven material does not I let out foam.

The results are presented in the Tables that follow.

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2

3

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4

Each series represents a repeated evaluation. The results collected in the Tables show an increase constant duration of the foam as the Jaguar concentration rises from 3% to 7%. Certainly increasing the duration makes the duration almost twice that found in the formula with 0%.

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Example 3

Another article is prepared for care effervescent type staff that has the composition given in the Table II Phase A is dry mixed in a mixer high speed shear, the fragrant agent is projected then on the resulting powder as phase B. For the composition cleaner only particles of size 75 to 900 are used micrometers These are separated by screening through a series of wire sieve Then they put 3 grams of the screened powder selected in a 5 cm by 7.5 cm bag made of Polyester / non-woven rayon. All faces are heat sealed

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TABLE II

5

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Example 4

This example presents experiments that correlate the average particle size with the intensification of  foaming In these experiments the given formulation was used in Table I, except that Jaguar levels C-13S® varied between 0% and 7% by weight.

Cleansing items for care Example 1 personnel were kept 15 cm from a tap. Left wet with water at 35-38 ° C at a flow rate of 9,000 ml / min the article on one side for 5 seconds. Then the other one got wet face for another 5 seconds. Later the article was passed to a small plastic tray and put in a test machine Instron® model 4501.

The Instron 4501® machine was set at a speed 250 mm / min and reference marks were made at -21 mm and 6.1 contact. The work used to deflate the item (this it is, the wavy bag) at the fixed distance was calculated integrating the area under a force versus distance curve generated by the Instron® machine. The results are shown in the Table III.

TABLE III Jaguar% for various particle sizes versus to work to deflate

6

Based on the results given in the Table III can be affirmed that foam intensification starts in the range between 75 and 850 micrometers. The results optimal can be found in the range of 180 to 450 micrometers

Claims (7)

1. A cleaning item for care substantially dry personnel, comprising:

(i)

a water insoluble substrate;

(ii)

a personal care composition adjacent to the substrate, which It includes:

(to)

from 0.5% to 60% by weight of the composition of at least one surfactant foam former;

(b)

from 2% to 15% by weight of the composition of a cationic polymer, Y

(C)

a vehicle for the foam-forming surfactant and the polymer cationic, the composition having an average particle size that It varies from 75 to 900 micrometers.

2. The article according to claim 1, in which the average particle size varies from 100 to 500 micrometers 3. The article according to claim 1 or claim 2, wherein the substrate forms a bag sealed that encloses an effervescent powder composition. 4. The article according to any of the preceding claims, wherein the cationic polymer is a cationic polysaccharide. 5. The article according to claim 4, in which the cationic polymer is the salt of guar hydroxypropyltrimony. 6. The article according to any of the preceding claims, wherein the cationic polymer is present in an amount of 3% to 10% by weight of the composition. 7. The article according to claim 1, in which the water insoluble substrate in relation to the composition It varies from 20: 1 to 1:20.